900438821 has 8 divisors (see below), whose sum is σ = 909968064. Its totient is φ = 890956800.

The previous prime is 900438811. The next prime is 900438853. The reversal of 900438821 is 128834009.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 900438821 - 2⁶ = 900438757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900438811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27206 + ... + 50408.

It is an arithmetic number, because the mean of its divisors is an integer number (113746008).

Almost surely, 2^900438821 is an apocalyptic number.

It is an amenable number.

900438821 is a deficient number, since it is larger than the sum of its proper divisors (9529243).

900438821 is a wasteful number, since it uses less digits than its factorization.

900438821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23611.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 900438821 is about 30007.3127920512. The cubic root of 900438821 is about 965.6462765231.

The spelling of 900438821 in words is "nine hundred million, four hundred thirty-eight thousand, eight hundred twenty-one".